; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s ; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-count=4 | FileCheck --check-prefix=UNROLL-4 %s ; RUN: opt < %s -S -passes='require,unroll' -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s ; RUN: opt < %s -S -passes='require,unroll' -unroll-runtime=true -unroll-count=4 | FileCheck --check-prefix=UNROLL-4 %s ; Given that the trip-count of this loop is a 3-bit value, we cannot ; safely unroll it with a count of anything more than 8. define i3 @test(i3* %a, i3 %n) { ; UNROLL-16-LABEL: @test( ; UNROLL-4-LABEL: @test( entry: %cmp1 = icmp eq i3 %n, 0 br i1 %cmp1, label %for.end, label %for.body for.body: ; preds = %for.body, %entry ; UNROLL-16-LABEL: for.body: ; UNROLL-4-LABEL: for.body: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] %sum.02 = phi i3 [ %add, %for.body ], [ 0, %entry ] %arrayidx = getelementptr inbounds i3, i3* %a, i64 %indvars.iv ; UNROLL-16-LABEL: for.body ; UNROLL-16-LABEL: getelementptr ; UNROLL-16-LABEL-NOT: getelementptr ; UNROLL-4-LABEL: getelementptr ; UNROLL-4-LABEL: getelementptr ; UNROLL-4-LABEL: getelementptr ; UNROLL-4-LABEL: getelementptr %0 = load i3, i3* %arrayidx %add = add nsw i3 %0, %sum.02 %indvars.iv.next = add i64 %indvars.iv, 1 %lftr.wideiv = trunc i64 %indvars.iv.next to i3 %exitcond = icmp eq i3 %lftr.wideiv, %n br i1 %exitcond, label %for.end, label %for.body ; UNROLL-16-LABEL: for.end ; UNROLL-4-LABEL: for.end ; UNROLL-16-NOT: for.body.epil: ; UNROLL-4: for.body.epil: for.end: ; preds = %for.body, %entry %sum.0.lcssa = phi i3 [ 0, %entry ], [ %add, %for.body ] ret i3 %sum.0.lcssa }